Wire-drawing apparatus



Nov. 22, 192 7. 1,649,912

F. MURPHY WIRE DRAWING APPARATUS Filed Dec. 21, 1923 2 Sheets-Sheet 1 fly. 1. 19

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Filed Dec. 21, 1923 2 Sheets-Sheet 85 19 a Patented Nov. 22,1927.

UNITED STATES r 1,649,912 PATENT} OFFICE.

rRANoIs -HURPHY, or CHICAGO, ILLINOIS, ASSIGNOR r WESTERN ELECTRIC 0'01!- PANY, hvooRPoRArEn, on NEW YORK, N. Y., A CORPORATION or NEW YORK.

wIREmRAwmG APPARATUS.

Application filed December 21', 1923. Serial No. 1,922.

, This invention relates to wire drawing apparatus, and more particularly to a machine for stringing and positioning'upon a rod or wire a series of dies preparatory to placing the. rod or wire with the dies strung thereon in a wire drawing machine for drawing it down to its final size.

An Object of the invention is to provlde a machine of the above mentioned type, so v equipped that the handling of the dies during the stringing operation is reduced to a minimum.

Another object of the invention is to provide a machine of the above mentioned type, which may be readily manipulated and controlled by the operator whereby'an expedi tiousstringing of the dies on the wire at a minimum cost is accomplished. I

' A further object of the invention .is to v provide a machine of the above type which is simple in construction, inexpensive to manufacture,- and. economical in maintenance.

In accordance with the general features of this invention there is provided a rotatable drum and a stationa about a common horizontal axis. The rotatable drum isada'pted to pull the rod or wire through a succession of dies individually. The stationary drum serves as a storage for the wire as the dies are successfully positioned thereon and also as a gauge for spacing the dies on the wire. Positioned above-the axis of the drawing block and stationary drum is' a combined die stop and storage member, and associated therewith is an adjustable auxiliary gauge which cooperates with the stationary drum to space the dies on the Wire. The combined die stop and storage member along with the die spacing gauges providea very efiicient arrange! ment whereby the strung wire and dies may be transferred from and stored in close association with the drawing block as'each die is strung upon the wire and the dies accurately spaced on the wire.

In the accompanying drawings,

Fig. 1 is a front elevation of a die stringing machine embodying the features of the invention;

Fig. 2 is a fragmentary side elevation thereof showing one stage of the stringing operation? Figs. 3 and 4 are fragmentary front elevationsof the machine showing several stages ofthe stringing operation, and

drum both mounted Fig. 5 .shows the wire with the drawing with the wire drawing apparatusfully disclosed in the co-pending application of Blount-Hernlund, Serial No. 566,222, filed June 6, 1922, which issued as Patent No.

1,621,309 dated March 15, 1927. In the accompanying' drawing the invention is shown as applied to the wire drawing apparatus disclosed in the application abovereferred to and reference may be' had tci'the said application for a full disclosure of the construction andfunctions of this apparatus.

As shown in the drawings, the operating parts of the machine are carried upon a frame 10 provided with a base 11.. Within the lower part of the frame 10 is [housed a driving motor (not shown), which. is connected to a driving shaft 12 carrying a sprocket 13. The sprocket '13 through a link chain 14; drives a sprocket 15 positioned at the upper part of the machine upon a shaft 16, connected by suitable gearing and clutching mechanism (not shown), con-' trolled bya foot lever 57 (shown depressed)- for starting and stopping a drawing block '28 secured to the forward end of a shaft '22.

Thedrawing block 28 carries a suitable gripper 29 mounted in a pocket 'or depression 30 formed at the forward end and about the peri hery thereof. For turning the drawin look by hand a handle 52 is provided w ich is mounted on the wire gripper 29. A spiral semi-circular groove 27, shown in dotted outline in Fig. 1, of suitable width is out in the drawing block 28, startin at the gripper and continuing for such a istance on a helix that willallow for the succeeding turns of wire clearing the gripper 29 as is usual in stringing machines and which is more fully illustrated in the co-pending application before mentioned. The gripper 29 is pivoted at 31 and in the'rotation of the drawin ment a out its pivot by stop pins 32 and 33 carried by the block 28. Mounted upon the frame '10 and about the-shaft 22 is a wire storage and gauge drum 36, Fig. 2, of the same diameter as the drawing hlock 28. Thedrum 36 is provided witha flange 37 block 28 it is. limited in its move- 1y thereabove. The bifurcated portion is by which it is suitably secured to the frame 10.; l 1

Securedto the flange 37 of the drum 36' by screws 17-17 is a U-shaped bracket 18,

the upper arm 19 of which is provided with a bifurcated portion 20, Fig. 2, extending at right angles thereto, and parallel to the axis of the drawing block, and positioned directada ted to serve as a combined die stop and storage device for the dies during the string-- ing operation and is disposed slightly to the vertical as shown-in Fin. 2 -for retaining the dies thereon. A vertical arm 21 of the bracket 18 is slotted as indicated at 42 and secured therein bv nuts 23-23 area plura1 itv of horizontally disposed posts '25. 25 which serve asan auxil ary gauge and co-\ operate with the drum 36 to space the dies on the wire, and as an auxiliarv storage for the wire as the dies are'successivelv strung thereon. By looseninsr the nuts 23 the posts may be adjusted verticallv upon the arm 21. Secured to the unner arm 19 and the lower arm 34 of the bracket 18 are posts 2%;and 26 respectively. which are similar to "theno ts 25; 25 and serve the same purpose.

Pivotallv secured to a bracket 48 secured tofthe Face of the frame 10 is a snrinq actuated arm 49 Figs. 1 and 2. normallv beariuq against the nerinherv ot the drum 36 adiacent its forwar .end. The arm 49 serves to ho d'the wire stored on the drum 36 from vcreeninq onto the drawina block 28 durinn:

operation of the latter. A spring 50 holds the arm 49 again t the drum 36.

A hraclret 54. supports a die holder I which isiadapted 'to swing; about a pivot 5f; on a rad us suitable for allowing several coils ot wire as reouired to b distr buted across the time oi the drawin r hlor-lr 98'.

Carri d upon a stud 59' fixed to the front face oi the tame l0 is a clutch trinnine:

* lever 62 provided with anuunwardlv nro- "iectinc: arm 83. Whejlevr '6 upon hein r moved about its pivot-stud '59 and toward the drum '36 causes a stoppa e ot he drawinQ bloclr luv the disenqae'ement of a clutch (not shown\ in the m nner tullv described" in the -co-pendin r appl cation before mentioned. An arm 64. on the lever 62. connects v i the latter to a toot lever 69. the arm 64incend of the wire to bestrung with dies as needed is carried on the frame 18 and is indicated at 81. This mechanism audits operation is fully described in the co-pendlng application above referred t0.- v

Operation.

In the operation of the machine a suflicient length of rod or wire is placed on the floor in the form of a long loop. The end 88 of the rod or wire isathen inserted between a pair; of 'the pointing rolls of the pointing mechanism 81. to be reduced in diameter or pointed for a sutficient distance from the end to receive the first die to'bo strung thereon. After placing "the first die, v

indicated at 85, on the. wire, it is'placed in held in the die holder 55 until a specifled predetermined number of turns of wire have been wound on the drawingblock 28, which will draw sufficient wire through'the die to provide for the succeeding reductions and proper locations of the other dies thereon,' as shown in Fig. 5. The foot treadle 69 is now depressed; which*causes the disengagement; of the clutch (not shown) and thereby the stopping: of the drawing block. The wire wound on the drawing block is removed by the operator and the die 85 strung thereon is placed behind the bifurcated portion 20 of the U-shaped'bracket 18, Fig. 3, which serves first as a die stop and second. as a die storage for all the dies as they are successivelv strung upon the wire.

After placing the die 85 behind the die? stop 20 the drawn wire is passed under and over certain of the posts carried on the U-shaped bracket 18 and then a specified number of turns of the wire are taken around the drum 36 by hand, depending upon the distance to be maintained between the die 85 just strung ahd the following die 95,'the wire being held on the drum 36 by the arm 49, and thereafter the wire is looped behind the arm 63 on the clutch tripping- Hill i may be varied.

With the die 85 positioned behind the die 1 stop 20 and the wire passed around certain posts and the required number of turns of the wire taken around the drum 36 to correctly position the following die on the wire, the operator points the end 83 of the wire again, if necessary, and a second die 95 is positioned thereon and placed in the holder with the end of the wire gripped by the gripper on the drawing block.

, The clutch is again engaged and the balance of the wire is pulled through the second'die untilall the slack is taken up and the wire becomes tight on the block 28 with the second die properly positioned on the wire with respect to the first die. At this instant the clutch is disengaged by the pull on the arm 63 after all the slack in the wire 7 is taken up. The movement of the arm 63 causes the disengager'nent of the clutch by moving the link downward as is done by a depression of the foot treadle '69, in the manner full described in the co-pending application fore mentioned. Upon the second die 95' being properly positioned on the wire it is removed from the die holder 55 and a specified number of turns of the' drawn wire on the block 28 is slid back ofi the same and :onto the storage drum 36, which operation i's'facilitated due to the fact that the block 28 and drum 36 are of the same diameter and in end to end engagement, The die 95 is then placed behind the die stop 20 adjacent the first die 85 positioned therebehind and the drawn wire is passed under and over, certain of the posts carried on the U-shaped bracket 18, Fig.- 4, 1 and then a specified number of turns of the wire are taken around the drum 36 by hand, depending upon the distance to be maintained between the die 95 just strung and the following die 96 all in a manner similar to that described in connection with the die 85. The wire is then looped behind the arm 63 of the tripp ng lever 62.

The end 83 of the wire is pointed again if necessary and the third die 96, fourth die '97, etc., are positioned thereon and placed in the holder and thereafter the same ro cedure is followed as has been described 'jacent thereto, and an auxiliary gauge The combined die stop and storage memher along with the die spacing gauges, all closely associated with the drawing block provide a compact and efiicient arrangement for a mechanism of this type, and one which results in reducing the time required by an operator to complete a stringing op eration. i

What is claimed is: 1. In a machine for stringing dies upon wire, a die holder, a drawing block, a wire storage'means adjacent thereto, and a combined die stop and diestorage member mounted adjacent said storage means, whereby the dies and wire may be. transferred from the die holder and drawing block rethan coil lengths after each die is strung, for

spacing the following die on the wire.

3. In a machine for stringing dies upon a wire, a drawing block, a'stationary gauge drum in end to end engagement axially aligned therewith, and an auxiliary gauge member mounted thereon, said gauge drum adapted to receive wire thereon in coil lengths, and said auxiliary gauge to receive lengths of .wire which are less than coil lengths after each die is strung for spacing the following die on the wire.

4. In a machine for stringing dies upon wire, a drawing block, a gauge drum admounted thereon, com rising a bracket memher and a plurality o spaced pins mounted thereon, adapted to support the wire, said gauge drum adapted to receive coil lengths of wire wrapped therearound, and said auxiliary gauge to receive lengths of wire-which are less than coil lengths after each die is strung for spacing the following die on the wire.

5. In a machine for stringing dies upon 125 wire, a drawing block, a gauge drum adjacent thereto; and an auxiliary gauge mounted thereon, comprising a bracket member and a plurality of adjustable members adapted to support the wire and mounted on-the bracket, J 9

&

said gauge drum adapted to receive coil lengths of wire wrapped therearound. and said auxiliary gauge to receive lengths of wire which are less than coil lengths after each die is strung for spacing the following die on the wire.

6. In a machine for stringing dies upon wire, a die holder, a drawing block, a wire storage drum in end to end engagement and mounted axially therewith, and a combined die stop and die storagemeans associated therewith whereby the dies and Wire may be transferred from the die holder and drawing block respectively and stored in close association with the drawing, block as each die is strung upon the wire, said means compris ing a. bifurcated member above and parallel emma with for receiving ooiledwire, a bracket attached to the drum, and a plurality of spaced pins mounted thereon and positioned for the selective looping therearound of portions of the wire of varying lengths less than the circumference of the drum.

In witness whereof, Ihereunto subscribe my name this 13th day of December A. 1)., 1923;

FRANCIS MURPHY. 

